#2451B3#2451B3

#2451B3 is a mid, vivid blue. Relative luminance 0.095; OKLCH L 46.4% C 0.164 H 263.0°. Best body text is #FFFFFF at 7.23:1 contrast (WCAG AA passes).

Color values

HEX	#2451B3
RGB	rgb(36, 81, 179)
HSL	hsl(221, 67%, 42%)
HSV	hsv(221, 80%, 70%)
CMYK	cmyk(79.9%, 54.7%, 0%, 29.8%)
CIE-LAB	lab(36.95, 21.21, -56.40)
CIE-LCH	lch(36.95, 60.25, 290.61°)
OKLab	oklab(46.4% -0.0199 -0.1627)
OKLCH	oklch(46.4% 0.164 263)
XYZ	xyz(11.8038, 9.5132, 43.8532)
Luminance	0.0951 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2451B3 #B38624

analogous

#2499B3 #2451B3 #3F24B3

triadic

#2451B3 #B32451 #51B324

tetradic

#2451B3 #B32499 #B38624 #24B33F

square

#2451B3 #B32499 #B38624 #24B33F

split-complementary

#2451B3 #B33F24 #99B324

monochromatic

#10234D #1A3A80 #2451B3 #3C6DD8 #6F93E2

Accessibility & contrast

On white

7.23

#2451B3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.90

#2451B3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #2451B3

7.23:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2451B3	#FFFFFF	#000000	##FFFFFF
##2451B3	1.00	7.23	2.90	7.23
#FFFFFF	7.23	1.00	21.00	1.00
#000000	2.90	21.00	1.00	21.00
##FFFFFF	7.23	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005EB6

Deuteranopia (green-blind)

#0051B1

Tritanopia (blue-blind)

#00697A

Achromatopsia (no color)

#575757

Design tokens & code

CSS

--color: #2451b3;
/* rgb */ color: rgb(36, 81, 179);
/* oklch */ color: oklch(46.4% 0.164 263.0);

Tailwind

colors: {
  custom: {
    50: '#7681ca',
    500: '#2451b3',
    950: '#000000',
  },
}

SCSS

$custom: #2451b3;
$custom-light: #7681ca;
$custom-dark: #000000;

JSON

{
  "hex": "#2451b3",
  "rgb": {
    "r": 36,
    "g": 81,
    "b": 179
  },
  "hsl": {
    "h": 221.119,
    "s": 66.512,
    "l": 42.157
  },
  "oklch": {
    "l": 0.46396,
    "c": 0.16391,
    "h": 263
  },
  "luminance": 0.09515
}

Semantic roles & 50–950 ramp

primary

#2451B3

secondary

#C9AB6A

accent

#B43EE9

background

#F7F7FC

surface

#EEEEF8

border

#C9C9D1

text

#0A0A13

muted

#7C7C82

Preview Lab

Preview with #2451B3

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →